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Doubles & Triples Practice Question 17

TDoubles & Triples · Question 17

A 'turntable' on a converter dolly:

• ASpins the trailer 360°
• BAllows the dolly to pivot under the second trailer for articulation
• CReplaces the fifth wheel
• DHolds the spare tire

Correct answer: B. Allows the dolly to pivot under the second trailer for articulation

Why: The turntable allows articulation between the dolly and the trailer ahead. Lubrication and inspection are required to ensure free movement.

How this question fits the Doubles/Triples test

Each additional articulation point multiplies rearward amplification. A driver pulling triples must steer earlier, brake sooner, and inspect twice as much equipment as a single-trailer driver.

Study technique for this topic

Learn the correct trailer placement order by weight, the procedure for converting a single to a double, and the special inspection items unique to converter dollies and pintle hook assemblies.

Related Doubles/Triples practice questions

• Q4. Rearward amplification:
• Q18. When backing doubles, drivers typically:
• Q31. When parked overnight, you should:
• Q44. A driver should never attempt to:
• Q57. When the company changes how trailers must be ordered, the driver should:

Continue your CDL preparation

The Doubles & Triples portion of the CDL knowledge exam covers more than this single question. Use this site's full Doubles & Triples bank to drill every topic, then test yourself with one of our state-specific practice sets to confirm you are ready for the actual DMV exam in your state. Always check your state's CDL handbook for any local addenda before the test day.

If you are still building your overall CDL foundation, start with the General Knowledge bank — every CDL applicant must pass it — and then work outward to the endorsements you plan to add.